[Obin Robinson]

besides wooden blocks, also get a hold of some strips of rubber. i've used bits of tires which were cut up into squares. it makes a nice soft surface, and one that is even more slip-proof than wood. use BOTH for the best non-skid and non-damaging surface to rest the engine on. just cut a tire with a set of tin snips or wire cutters.... or, a junkyeard may already have bits of rubber that you can use.

good luck!

obin